<template>
  <el-menu
    background-color='#545c64'
    text-color="#fff"
    active-text-color='#ffd04b'
    default-active="1-4-1"
    class="el-menu-vertical-demo"
    @open="handleOpen"
    @close="handleClose"
    :collapse="isCollapse"
  >
    <h3>{{isCollapse?'后台':'通用后台管理系统'}}</h3>
    <el-menu-item @click="clickMenu(item)" v-for="item in noChildren" :index="item.path" :key="item.path">
      <i :class="'el-icon-'+item.icon"></i>
      <span slot="title">{{item.label}}</span>
    </el-menu-item>
    <el-submenu v-for="item in hasChildren" index='1' :key="item.path">
      <template slot="title">
        <i :class="'el-icon-'+item.icon"></i>
        <span slot="title">{{item.label}}</span>
      </template>
      <el-menu-item-group v-for="(subItem,subIndex) in item.children" :key="subItem.path">
        <el-menu-item @click="clickMenu(subItem)" :index="String(subIndex)">{{subItem.label}}</el-menu-item>
      </el-menu-item-group>
    </el-submenu>
  </el-menu>
</template>
<style lang="less" scoped>
.el-menu-vertical-demo:not(.el-menu--collapse) {
  width: 200px;
  min-height: 400px;
}
.el-menu{
  height:100%;
  border:0;
  h3{
    color: #fff;
    text-align: center;
    line-height: 48px;
  }
  
}
</style>

<script>
export default {
  name: "CommonAside",
  data() {
    return {
      // 菜单栏数据，可以用后端接口数据替换
      menu: [
        {
          path: "/",
          name: "home",
          label: "首页",
          icon: "s-home",
          url: "Home/Home",
        },
        {
          path: "/mall",
          name: "mall",
          label: "商品管理",
          icon: "video-play",
          url: "MallManage/MallManage"
        },
        {
          path: "/user",
          name: "user",
          label: "用户管理",
          icon: "user",
          url: "UserManage/UserManage"
        },
        {
          label: "其他",
          icon: "location",
          children: [
            {
              path: "/page1",
              name: "page1",
              label: "页面1",
              icon: "setting",
              url: "Other/PageOne",
            },
            {
              path: "/page2",
              name: "page2",
              label: "页面2",
              icon: "setting",
              url: "Other/PageTwo",
            },
          ],
        },
      ],
    };
  },
  methods: {
    handleOpen(key, keyPath) {
      console.log(key, keyPath);
    },
    handleClose(key, keyPath) {
      console.log(key, keyPath);
    },
    // 点击菜单栏跳转到对应路由页面
    clickMenu(item){
      this.$router.push({
        name:item.name
      })
      this.$store.commit('selectorMenu',item)
    }
  },
  computed:{
    // 过滤出没有子路由的数据
    noChildren(){
        return this.menu.filter(item=>!item.children)
    },
    // 过滤出有子路由的数据
    hasChildren(){
        return this.menu.filter(item=>item.children)
    },
    // 获取state中的isCollapse
    isCollapse(){
      return this.$store.state.tab.isCollapse
    }
  }
};
</script>